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🌍 Geo Tool
Area Polygon Area
Calculate the precise area of any GeoJSON polygon in square kilometers, meters, and acres.
About this tool
The PixelForge Polygon Area Calculator lets you draw or paste any polygon on an interactive map and instantly get its area in square kilometres, square metres, acres, or hectares. It is powered by Turf.js and Leaflet, running fully in your browser with no server uploads. This is ideal for land surveying estimates, agricultural planning, urban boundary analysis, or verifying GeoJSON polygon data. You can also paste raw GeoJSON coordinates to get the area without drawing manually.
Frequently Asked Questions
Results are shown in square kilometres, square metres, acres, and hectares simultaneously so you can read the unit most relevant to your work.
The tool uses geodesic calculations via Turf.js so it accounts for the curvature of the Earth. For small areas the difference from a flat projection is negligible, but for large regions the geodesic result is significantly more accurate.
Yes. Paste a GeoJSON Polygon or MultiPolygon and the tool will parse it, display it on the map, and calculate the area automatically.
There is no hard limit. Country-sized polygons with thousands of vertices are handled without issues.
The tool is designed for geographic coordinates (latitude/longitude). For purely mathematical 2D area calculations the Turf.js geodesic approach may not be appropriate.